Electric seat frame

Abstract

This application relates to an electric seat frame, including a drive assembly, a backrest assembly, and two mechanical extension units. Each mechanical extension unit consists of a leg assembly, a support assembly, and a transmission rod. The two leg assemblies are respectively mounted on two support assemblies. The drive assembly includes a front drive rod and a rear drive rod. The two ends of the front drive rod are respectively connected to the two leg assemblies, and the two ends of the rear drive rod are respectively mounted on the two support assemblies. A seat frame assembly is also provided. The backrest assembly includes a backrest frame and a backrest connector. The backrest frame is fixedly connected to the backrest connector. The backrest connector is hinged to the support assembly via a hinge shaft of the backrest connector support assembly. The backrest connector is hinged to the rear end of a transmission rod via a hinge shaft of the backrest connector transmission rod. The front end of the transmission rod is hinged to the leg assembly via a hinge shaft of the transmission rod leg assembly. The seat frame assembly is fixedly connected to the two support assemblies. This application offers convenient installation, maintenance, and alignment, and good overall stability.

Description

Technical Field

[0001] This application relates to an electric seat frame, which is mainly applicable to the design and production of posture-adjustable electric sofa frames. Background Technology

[0002] See the patent publication document with application publication number CN110693227A and invention title "An Electromechanical Extension Device". The main defects of the prior art are: 1. It does not include a seat frame, which is inconvenient to install and increases the installation and adjustment steps; 2. The installation and alignment of the two mechanical extension units on both sides is more troublesome, which increases the workload of debugging and affects the overall stability and quality of the product. Summary of the Invention

[0003] The technical problem solved by this application is to overcome the shortcomings of the existing technology and provide an electric seat frame that is easy to install, maintain, and align, and has good overall stability.

[0004] The technical solution adopted by this application to solve the above-mentioned technical problems is as follows: an electric seat frame, including a drive assembly, a backrest assembly, and two mechanical extension units arranged symmetrically on the left and right sides. Each mechanical extension unit consists of a leg assembly, a support assembly, and a transmission rod. The two leg assemblies are respectively mounted on two support assemblies. The drive assembly includes a front drive rod and a rear drive rod. The two ends of the front drive rod are respectively connected to the two leg assemblies, and the two ends of the rear drive rod are respectively mounted on the two support assemblies. The characteristic is that a seat frame assembly is also provided. The backrest assembly includes a backrest frame and a backrest connector. The backrest frame is fixedly connected to the backrest connector. The backrest connector is hinged to the support assembly through a hinge shaft of the backrest connector support assembly. The backrest connector is hinged to the rear end of the transmission rod through a hinge shaft of the backrest connector transmission rod. The front end of the transmission rod is hinged to the leg assembly through a hinge shaft of the transmission rod leg assembly. The seat frame assembly is fixedly connected to the two support assemblies. Through the above design, this application integrates two symmetrically arranged support components on both sides into a single structure with the seat frame component, and the backrest component is also a single structure. This makes alignment, installation, and maintenance more convenient and accurate, resulting in high symmetry of the mechanical extension units on both sides and good overall stability.

[0005] The support assembly described in this application includes a support frame, support legs, a front seat frame fixing member, a leg assembly fixing member, and a rear seat frame fixing member, all fixed together. Leg assemblies are mounted on the leg assembly fixing member, which also has a front seat frame positioning boss. The rear seat frame fixing member has a rear seat frame positioning boss and a hinge shaft for the backrest connector support assembly. The seat frame assembly mates with the front seat frame fixing member, the front seat frame positioning boss, the rear seat frame positioning boss, and the rear seat frame fixing member. When the seat frame assembly engages with the two support assemblies on both sides and pushes them inwards, the two support assemblies are precisely aligned front to back, and the seat frame assembly is accurately positioned on the front and rear seat frame positioning bosses, with accurate height alignment, facilitating installation with bolts and screws.

[0006] The support frame described in this application is equipped with handrails to facilitate use by the elderly and those with weak constitutions and to improve safety.

[0007] The support foot described in this application includes a snap-fit ​​component and a base. The snap-fit ​​component engages with the lower part of the support frame, and the snap-fit ​​component also engages with the base, facilitating installation and maintenance.

[0008] The base can be a regular support with a flat bottom (without casters), or it can be a support with casters to facilitate seat movement.

[0009] The drive assembly also includes a drive device. The front end of the drive device is hinged to the drive front rod hinge shaft via the drive device drive front rod hinge shaft, which is located below the hinge shaft of the transmission rod leg assembly. The rear end of the drive device is hinged to the drive rear rod. Because the drive device drive front rod hinge shaft is located below the hinge shaft of the transmission rod leg assembly, the driving force of the drive device (specifically, an electric push rod) is approximately horizontal, thus relatively improving the working efficiency of the drive device.

[0010] The leg assembly described in this application comprises a first leg link, a second leg link, a third leg link, a fourth leg link, a fifth leg link, a sixth leg link, and a footrest connector. One end of the first leg link and the second leg link are both hinged to the leg assembly fixing member. The middle part of the first leg link is fixedly connected to the drive front rod. The first leg link is hinged to the front end of the transmission rod through the hinge shaft of the leg assembly. The other end of the first leg link is hinged to one end of the third leg link. The middle part of the third leg link is hinged to the middle part of the second leg link. The other end of the third leg link is hinged to one end of the fifth leg link. The middle part of the fifth leg link is hinged to the middle part of the fourth leg link. The other end of the fifth leg link is hinged to one end of the sixth leg link. The other end of the sixth leg link is hinged to one end of the footrest connector. The other end of the footrest connector is hinged to one end of the fourth leg link. The other end of the fourth leg link is hinged to the other end of the second leg link.

[0011] Compared with the prior art, this application has the following advantages and effects: convenient installation and maintenance, and good overall stability. Attached Figure Description

[0012] Figure 1 This is a partial exploded view of an embodiment of this application.

[0013] Figure 2 This is a three-dimensional schematic diagram of the sitting posture in an embodiment of this application.

[0014] Figure 3 This is a side view of the seated posture in an embodiment of this application.

[0015] Figure 4 This is a side view of the lying position in an embodiment of this application.

[0016] Figure 5 This is a three-dimensional schematic diagram of the lying posture in an embodiment of this application.

[0017] In the picture:

[0018] Drive assembly 1, drive front rod 11, drive rear rod 12, drive device 13, drive device drive front rod hinge shaft 131, leg assembly 2, first leg connecting rod 21, second leg connecting rod 22, third leg connecting rod 23, fourth leg connecting rod 24, fifth leg connecting rod 25, sixth leg connecting rod 26, footrest connecting piece 27, side support assembly 3, support frame 31, armrest 311, support foot 32, snap-fit ​​piece 321, base foot 322, seat frame front fixing piece 33, leg assembly fixing piece 34, seat frame front positioning boss 341, seat frame rear fixing piece 35, seat frame rear positioning boss 351, backrest assembly 4, backrest frame 41, backrest connecting piece 42, backrest connecting piece support assembly hinge shaft 421, backrest connecting piece transmission rod hinge shaft 422, seat frame assembly 5, transmission rod 6, transmission rod leg assembly hinge shaft 61. Detailed Implementation

[0019] The present application will be further described in detail below with reference to the accompanying drawings and embodiments. These embodiments are illustrative of the present application, but the present application is not limited to them. Figure 3 Left is front, right is back.

[0020] See Figures 1-5The electric seat frame of this application includes a drive assembly 1, a backrest assembly 4, and two mechanical extension units symmetrically arranged on the left and right sides. Each mechanical extension unit consists of a leg assembly 2, a support assembly 3, and a transmission rod 6. The two leg assemblies 2 are respectively mounted on the two support assemblies 3. The drive assembly 1 includes a front drive rod 11 and a rear drive rod 12. The two ends of the front drive rod 11 are respectively connected to the two leg assemblies 2, and the two ends of the rear drive rod 12 are respectively mounted on the two support assemblies 3. A design feature of this application is that a seat frame assembly 5 is also provided. The support assembly 3 includes a support frame 31 and support feet 32. The backrest assembly 4 includes a backrest frame 41 and a backrest connector 42. The backrest frame 41 and the backrest connector 42 are fixedly connected. The backrest connector 42 is hinged to the support frame 31 via a hinge shaft 421 of the backrest connector support assembly. The backrest connector 42 is hinged to the rear end of the transmission rod 6 via a hinge shaft 422 of the backrest connector transmission rod. The front end of the transmission rod 6 is hinged to the leg assembly 2 via a hinge shaft 61 of the transmission rod leg assembly. The seat frame assembly 5 is fixedly connected to the two support assemblies 3. Through the above design, the two symmetrically arranged support assemblies 3 on both sides are directly integrated with the seat frame assembly 5 to form an integral structure. The backrest assembly 4 is also an integral structure, making alignment, installation, and maintenance more convenient and accurate. This results in high symmetry of the mechanical extension units on both sides and good overall stability.

[0021] The support assembly 3 includes a support frame 31, support feet 32, a front seat frame fixing member 33, a leg assembly fixing member 34, and a rear seat frame fixing member 35, all fixed together. The leg assembly 2 is mounted on the leg assembly fixing member 34, which is provided with a front seat frame positioning boss 341. The rear seat frame fixing member 35 is provided with a rear seat frame positioning boss 351 and a backrest connecting member support assembly hinge shaft 421. The seat frame assembly 5 cooperates with the front seat frame fixing member 33, the front seat frame positioning boss 341, the rear seat frame positioning boss 351, and the rear seat frame fixing member 35. When the seat frame assembly 5 is engaged with the two support assemblies 3 on both sides and the two support assemblies 3 are pushed inward, the two support assemblies 3 are accurately aligned front to back, and the seat frame assembly 5 is accurately positioned on the front seat frame positioning boss 341 and the rear seat frame positioning boss 351, making it convenient for the installer to fix it with bolts and screws.

[0022] The support frame 31 described in this application is provided with a handrail 311, which is convenient for the elderly and frail to use and improves safety.

[0023] The support foot 32 described in this application includes a snap-fit ​​member 321 and a base foot 322. The snap-fit ​​member 321 engages with the lower part of the support frame 31, and the snap-fit ​​member 321 engages with the base foot 322, which facilitates installation and maintenance.

[0024] The base can be a regular support with a flat bottom (without casters), or it can be a support with casters to facilitate seat movement.

[0025] The drive assembly 1 also includes a drive device 13. The front end of the drive device 13 is hinged to the drive front rod 11 via a drive device drive front rod hinge shaft 131. The drive device drive front rod hinge shaft 131 is located below the transmission rod leg assembly hinge shaft 61. The rear end of the drive device 13 is hinged to the drive rear rod 12. Because the drive device drive front rod hinge shaft 131 is located below the transmission rod leg assembly hinge shaft 61, the driving force of the drive device 13 (specifically, an electric push rod) is approximately horizontal, thus relatively improving the working efficiency of the drive device 13.

[0026] The leg assembly 2 of this application consists of a first leg link 21, a second leg link 22, a third leg link 23, a fourth leg link 24, a fifth leg link 25, a sixth leg link 26, and a footrest connector 27. One end of the first leg link 21 and the second leg link 22 are both hinged to the leg assembly fixing member 34 of the support assembly 3. The middle part of the first leg link 21 is fixedly connected to the drive front rod 11, and the upper part of the first leg link 21 is hinged to the front end of the transmission rod 6 through the transmission rod leg assembly hinge shaft 61. The other end of the first leg link 21 is connected to the third leg link 26. One end of the connecting rod 23 is hinged, the middle of the third leg connecting rod 23 is hinged to the middle of the second leg connecting rod 22, the other end of the third leg connecting rod 23 is hinged to one end of the fifth leg connecting rod 25, the middle of the fifth leg connecting rod 25 is hinged to the middle of the fourth leg connecting rod 24, the other end of the fifth leg connecting rod 25 is hinged to one end of the sixth leg connecting rod 26, the other end of the sixth leg connecting rod 26 is hinged to one end of the footrest connecting piece 27, the other end of the footrest connecting piece 27 is hinged to one end of the fourth leg connecting rod 24, and the other end of the fourth leg connecting rod 24 is hinged to the other end of the second leg connecting rod 22.

[0027] The application process is as follows:

[0028] exist Figure 3 In the aforementioned sitting posture, if the user wishes to adjust the seat position, they can control the drive device 13 via a controller (existing technology, not shown in the figure), thereby driving the drive front rod 11 forward, causing the leg assembly 2 to extend forward. Simultaneously, as the leg assembly 2 extends forward, the first leg link 21 drives the transmission rod 6 forward via the transmission rod leg assembly hinge shaft 61, thereby causing the backrest connector transmission rod hinge shaft 422 to move forward. This causes the backrest frame 41 to tilt backward relative to the backrest connector support assembly hinge shaft 421, reaching the desired position and then disengaging the controller or reaching the maximum tilt angle (i.e.,...). Figure 4 , Figure 5 Stop tilting after reaching the lying position (as shown). Returning to the sitting position from the lying position is similar.

[0029] All parts not described in this application are prior art and will not be detailed further. Any simple modifications or combinations of the technical features and solutions of this application shall be considered to fall within the protection scope of this application.

Claims

1. An electric seat frame, comprising a drive assembly, a backrest assembly, and two symmetrically arranged mechanical extension units, each mechanical extension unit consisting of a leg assembly, a support assembly, and a transmission rod, wherein the two leg assemblies are respectively mounted on two support assemblies, the drive assembly includes a front drive rod and a rear drive rod, the two ends of the front drive rod being connected to the two leg assemblies respectively, and the two ends of the rear drive rod being respectively mounted on the two support assemblies, characterized in that: The system also includes a seat frame assembly. The backrest assembly comprises a backrest frame and a backrest connector. The backrest frame and the backrest connector are fixedly connected. The backrest connector is hinged to the support assembly via a hinge shaft of the backrest connector support assembly. The backrest connector is also hinged to the rear end of a transmission rod via a hinge shaft of the backrest connector transmission rod. The front end of the transmission rod is hinged to the leg assembly via a hinge shaft of the transmission rod leg assembly. The seat frame assembly is fixedly connected to two support assemblies. The support assembly comprises a support frame, support legs, a front seat frame fixing member, a leg assembly fixing member, and a rear seat frame fixing member, all fixed together. Leg assemblies are mounted on the leg assembly fixing member. A front seat frame positioning boss is provided on the leg assembly fixing member. A rear seat frame positioning boss and a hinge shaft of the backrest connector support assembly are provided on the rear seat frame fixing member. The seat frame assembly mates with the front seat frame fixing member, the front seat frame positioning boss, the rear seat frame positioning boss, and the rear seat frame fixing member.

2. The electric seat frame according to claim 1, characterized in that: The support frame is equipped with handrails.

3. The electric seat frame according to claim 1, characterized in that: The support leg includes a snap-fit ​​component and a base. The snap-fit ​​component engages with the lower part of the support frame, and the snap-fit ​​component engages with the base.

4. The electric seat frame according to claim 3, characterized in that: The base is a regular support with a flat bottom or a support with pulleys.

5. The electric seat frame according to claim 1, characterized in that: The drive assembly also includes a drive device. The front end of the drive device is hinged to the front rod via the drive device drive front rod hinge shaft. The drive device drive front rod hinge shaft is located below the hinge shaft of the transmission rod leg assembly. The rear end of the drive device is hinged to the rear rod.

6. The electric seat frame according to claim 1, characterized in that: The leg assembly consists of a first leg link, a second leg link, a third leg link, a fourth leg link, a fifth leg link, a sixth leg link, and a footrest connector. One end of the first leg link and the second leg link are both hinged to the leg assembly fixing member. The middle part of the first leg link is fixedly connected to the drive front rod. The first leg link is hinged to the front end of the transmission rod through the hinge shaft of the leg assembly. The other end of the first leg link is hinged to one end of the third leg link. The middle part of the third leg link is hinged to the middle part of the second leg link. The other end of the third leg link is hinged to one end of the fifth leg link. The middle part of the fifth leg link is hinged to the middle part of the fourth leg link. The other end of the fifth leg link is hinged to one end of the sixth leg link. The other end of the sixth leg link is hinged to one end of the footrest connector. The other end of the footrest connector is hinged to one end of the fourth leg link. The other end of the fourth leg link is hinged to the other end of the second leg link.

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